一侧胸廓饱满，叩诊鼓音，最可能的疾病是（）
A.急性肺炎
B.气胸
C.支气管哮喘
D.喘息性支气管炎
E.急性胸膜炎
参考答案：B
Daniel is _____ his purse, but he can’t _____ it. [ ]
A. looking for; find
B. seeing; look for
C. finding; look at
D. looking at; see
某水域5次CODCr的监测浓度分别为：14.0mg/L、16.5mg/L、20.8mg/L、18.7mg/L、21.4mg/L，采用内梅罗法计算CODCr的监测统计代表值为（）。
A.17.9mg/L
B.18.3mg/L
C.19.9mg/L
D.20.4mg/L
